Ascientist claims that flowers grow better in acidic soil than in basic soil. what should occur to make this a valid scientific claim?

Read the quote from hezekiah niles on page 150, based on this quote, what is a defining characteristic of the era of good feelings?

What was the main aim of the northwest ordinance of 1787

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.